IEC 60651 Replaced
IEC 60651:1979/AMD1:1993
Amendment 1 - Sound level meters
Contains changes to the clauses of IEC 651 and a new appendix D with
equations for design-goal frequency weightings.
equations for design-goal frequency weightings.
CHF 20.-
This publication has been replaced by: IEC 61672-2:2003 IEC 61672-1:2002